Razor blade backing machine



June 16, 1953 w. BINDSZUS RAZOR BLADE BACKING MACHINE 3 Sheets-Sheet 1 Filed Feb. 23, 1946 m T m w.

W. BINDSZUS RAZOR BLADE BACKING MACHINE June 16, 1953 3 Sheets-Sheet 2 Filed Feb. 23, 1946 June 16, 1953 w. amoszus 2,642,111

RAZOR BLADE BACKING MACHINE Filed Feb. 25," 1946 3 Sheets-Sheet 5 Patented June 16, 1953 UNITED STATES OFICE 2,642,131 RAZORBLADEBACKING MACHINE V William,Bindszus,Ruthedord,.;N...I. Application February 23, lllfifiSeridl-Nm-6493afl My invention xelates to a machine for attach :ing :the :usual hack :to the back edge of singleedee safety razor :blades.

'ifhe hack on :a singleeedge iblade is convenient :ifor handling the same and functions :to align the blade in the safety razor holder.

One object of my ;-improved machine :is to secure a maximum frictional grip .of the :back on the blade :so ;as "to prevent its looseningiup -.or shifting position after attachment.

.Another object is to provide an improved ;machine for precisely :aligning each back with its iblade.

A :fiurtherzobject :is :to :provide :an improved single-edeerblade backingzmachineithatwillgreat- P 1 :ly simplify and-speedupproduction.

.A still ;-fu1tther pbiect is to provide :cam controlled means adapted to prolong the i-nressin together of the ,two flanges of the back on its .blade thereby to -.overcom,e iflanges .to springaapart as when the hackisolesed by .a blow.

.And a still ;,further object .is to mtcuide :imroved ieeding means whereby the :blades are :ied lengthwisely to the "press and ithe backs :are

.fed breadthwisely onto :the :blades, athus minimizing the distance of travel of these two elements to the hackin "station. 7

With these and other objects inwview, mar invention consists in' the novel .iconstriudtion rand arrangement of-partsJ-hereinaiter described, 111.11.18- trated :in the accompanying drawings, and particularly :poin ed out in the appended claims, 1111 being understoodthat variousrchangesain ithezcrms't-ructional details may abe .made without departing from :the spirit of :the invention or sacrificing any of the advantages ethereof :the drawings, :Fig. :1 .is a ffrontwiewgpartly in section and ipartly broken away, of rthe "hackingipart .ofzthe machine;

Fig.2 is a frontxview of sassingle :edge blade;

isa perspective View -o'fanlopen-veshaped back .131101 :to attachment to .a blade;

Fig. A is a side view, partly in :section, sof rthe blade backing elements of the machineuwhichlcooperate in assembling and clamping :a back :on the :blade;

Figs. {5, '6, and 7 are views similar to Fig. -4- showing the hacking :operation in three progressive stages;

' Fig. -8 is a :plan view o'f backs onto blades;

Figs. 9 and lo areplan views of two carriage members; Y

I Fig.'I-1 is adetail o'f=a spring -pressedfinger;-

lihe parts for feeding the tenden y inf said 1 1 Claim. (Cl. 153ml) :E'ig. 12 is a fragmentary enlarged detail of an anvil and {die with 1a back :and blade clamped :therehetween.

'Rieierringrto Figs. .1 to '12 inclusive pf :the drawings, l is the :irame of the backing part of the .imachine embodying arny invention which frame ibroadly comprises :a .table :portion and an upstanding head :portion, 2 a track for 'a stack of blades 3ghaving-ztranks 4 adapted to fit the usual matches iormed iin the opposite ends of such hlades, and at its .bottom a slot 5 corresponding iii-width :hOWheE 'hiQknQSSiQf one blade. For transporting iblades from 'zthe :rack to the hacking station, reciprocating carriage members 6 .and 1 :are moun ed :under the mask 2 :for horizontal sliding movement: the member :6 is :forked at oneiend .so;as ;to-nresentztwo parallel conveying rledges :and has :an integral upstanding lever arm .8 -at its other end; a pair of Slugs :9 are formed integral 201119 on each eOnVeying ledge, while a hair of .snrine-enressed pivoted :fingers is spaced from said Jugs are :mounted in :suitable notches iormediin :said dodges, one opposite the other so ;that 11311911 rtipscandathe 113195 of lugs .9 protrude ahove theconveyingsurfacesrof said ledges a distance about equal to the thickness :of tone blade. Ellhe member 11 has .a broad base upon which the members :is -.sunnorted, an integral depending lever arm 11:11 anda single eentrallydisposed con- Neying ledge :pQrtionrisine-at right angles to said base :which :iits between :the fork and two ledges ofzmemher g6 so-that intheir assembled relation all three conveying led es are flush. Pivotally moun ed zln rSu-itable :notches formed in the ledge flmfimbfil 1 :are two-similar spring pressed fingers .2131, firspacedmne from the other. The carriage members 16 and :1 :bei-ng mounted on the table .of iirame ii 110:." sliding "recinrooable .rnovemerit, their arms .8, =11 are :connected through links 1:4,:15respectivelyitoiaarocker:bar l5 pivoted to :a ifulorum L1 501']- :the aframe "I and ;at its lower end :toaconnecting rod t8 moved :by a crank pin 19 -;on :a :rotating :disc 2211. During their movement from :rack (to hacking station, the back edges of the liladesst'are1g1iidedagainsta rail (:notshownl so that their finished mutating edges which overhang ithe outer edge of rthexmember 76 .are out of contact -wi-th;any part-and thuszprotected against damage. During ztheir :travel :from rack to hack ing station, the loose bl'ades may he held down on the conveying ledges and against the spring pressure of fingers ll), 42, 13 moving beneath them by "a flat sspring "(not shown). The parts thus far described constitute the means 'for feed- 55 mg blades to the bacliing station.

The parts of the blade-backing device comprise a vertically depressible bed 2|, resiliently mounted upon a compression spring 22 and retained in position by bolts 23, 24 slidable in suitable holes drilled in a block 25 fixed in the frame I. The block 25 is formed with a raised portion constituting a fixed anvil or die 26 the top face of which in its assembled relation lies normally slightly lower than the surface of the bed 2 l. A rectangular block the lower portion of which constitutes a complementary movable die 27 is mounted in guides 28 for vertical sliding movement over and in line with the anvil die 26. In the front face of the die 2! is formed a recess 29 having a slot 3|) therein. Fitted in the recess 29 is a slidable member 3| having an integral enlarged lower portion 32 carrying spaced prongs 33; the upper end of member 3| is slotted at 34 to accommodate one end of a lever arm- 35 pivoted on a pin 36 and extending through the slot 30 in member 21 to raise and lower the member 3|. The upper end of the die block 21 is connected to a toggle 3? controlled by'a lever arm 38, fulcrumed and having a cam-follower which follows an interior cam formed within a wheel on the main driving shaft (these parts not shown). Upstanding cam-controlled rods 39 having wedge-shaped upper ends are mounted for vertical movement. A fiat spring may be provided to hold the blade on the bed 2| during the backing operation. The dies 26, Zl may be grooved as shown at Fig. 12 so as to form a bead on the back when the same is clamped on the blade.

In a magazine'chute 40 disposed transversely in inverted nested relation to'each other is a supply of backs 3| fed by gravity to a pair of notched rolls 42 spaced from one another so as to receive in said notches simultaneously the opposite ends of each successive partially open back and to move same breadthwisely directly toward the back edge of the blade fixed on the bed 22. The under part of the 'chute 40 is cutaway centrally thereof adjacent its mouth which leads directly up to the anvil die 26, to accommodate the rods 39,

The backing operation is as follows: The lowermost blade 3 on movement of the member 6 is caught by lugs 9 and carried to the left one step out of rack 2 through the slot 5. At the same time by reciprocating action of the mem ber 1 traveling to the right its finger l3 passes between lugs 9 to a point slightly behind the trailing edge of the blade and upon reversal of movement of the members 8, l the said finger l3 in turn catches said edge and carries the blade along a second step; meanwhile the finger pair in on member 6 pass iuider the blade to a point slightly behind its trailing edge and upon reversal of movement of said members said fingers l catch said edge and advance the blade a third step; while with similar action the finger l2 catches said trailing edge and advances the blade a fourth and final step onto the bed 2|. The carriage members 6, "I thus transport the blade in four short quick steps from the rack to the backing station, the movement being con-' tinuous and in timed relation. The member 3| is next moved downward by its lever arm 35, suitably controlled by an exterior cam on said wheel mounted on the main driving shaft, until its prongs 33 engage the usual notches formed in the blade and thereby exactly position and fix the blade to receive a back.

The lowermost back 4| is new advanced by ro- (not shown) from their tation of the notched rolls 42 to the end of the chute 40 over its said cut -away portion and the rods 39 with their wedge shaped ends move upward so as to wedge the back forward onto the die 26 and the back edge of the blade'3 with the backs flanges enfolding and in contact with said edge to hold the back in this position until the die 21 moving downward in its guides 28 by action of the cam-controlled toggle 31 presses the back upon the die 26 tightly clamping the same on the blade and then quickly releases the same, whereupon the member 3| is raised and the blade freed to be pushed out of the backing station by the succeeding blade. The movements of the respective parts as described are of course all in timed relation one to the other.

Following the backing operation, as each blade 3 is successively freed by raising of the prongs 33 of member 3| and the blade is pushed by a succeeding blade off the bed and out of the backing station, the line of backed blades. end to end, is then turned by means of a spiral guideway flat position to a position at right-angles thereto, so to continue their movement in line on edge with backs down and finished cutting edges uppermost and free from contact with any part of the machine, and the backed blades are held in this position throughout the shelling operation by suitable channel guideways and rails which contact only the backs on the blades.

In connection with the backing part of the machine suitable safety devices may be provided to automatically stop the machine and protect the same against damage upon any failure in its operation, as for example in the case of jamming up of blades or backs, but as it is customary in a machine of this type to provide such safety devices these have not been shown.

Although the drawings and the foregoing specification describe and disclose the best mode in which I have contemplated embodying my invention, I desire to be in no way limited to the details of such disclosure, for in the further practical application of my invention many changes in form and construction may be made as circumstances require or experience suggests without departing from the spirit of the invention within the scope of the appended claim.

What I claim is:

A razor blade backing machine comprising a press having a toggle operated main ram; an auxiliary holding ram being slidably operable in front of said main ram; a cam operatedlever having one end in operable engagement with said auxiliary ram, said lever extending through an opening in said main ram; cam operated driving means engaging the other end of said lever, said driving means being coordinated with said main ram; a resilient spring supported anvil mounted under said auxiliary holding ram; a fixed anvil being located under said main ram; a coordinated feeding mechanism feeding one blade at a time into engagement with said auxiliary holding ram from one side; a positive rotary feeding mechanism coordinated with said rams feeding a back onto said blade from the rear of said rams, said positive rotary feeding mechanism comprising a hopper chute containing a stack of backs, a pair of vertically-journalled rotatable shafts located slightly to the rear of said main ram, each of said shafts having a disc near its upper end, said discs each having a notch engageable with the ends of said backs, said shaft being geared together and driven in opposite directions, said gearing being coordinated with the driving means of said rams, and a vertically moveable coordinated holding cam located between said discs, said cam having an inclined plane at backs are pushed against said blades and held securelyin position while said main ram oompletes the fastening of said back.

WILLIAM BINDSZUS.

References Cited in the file of this patent UNITED STATES PATENTS Name Date Number 203,428

its upper end whereby said 5 De Forest May 7, 1878 m Number 6 Name Date Seeley Sept. 7, 1897 Cobb Nov. 11, 1902 Sundback Sept. 4, 1923 Gaisman et a1. June 14, 1927 Cody Nov. 26, 1929 Smith Apr. 11, 1938 Hanney Mar. 20, 1934 Ulrich Feb. 2, 1937 Eisen et al. May 17, 1938 Bodkin July 30, 1940 Balthasar Oct. 13, 1942 Engel Oct. 30, 1942 Frank Mar. 20, 1945 

